DTC C0064 Primary Suction Valve Malfunction In VDCCM&H/U

DTC DETECTING CONDITION:

Defective harness connector
Defective VDCH/U solenoid valve

TROUBLE SYMPTOM:

ABS does not operate.
EBD does not operate.
VDC does not operate.

WIRING DIAGRAM:

Fig 1: Primary Suction Valve Malfunction In VDCCM&H/U - Wiring Diagram

G05020302

DIAGNOSIS PROCEDURE

Step	Check	Yes	No
1 CHECK THE VDCCM&H/U INPUT VOLTAGE. Turn the ignition switch to OFF. Disconnect the connector from the VDCCM&H/U. Run the engine at idle. Measure the voltage between VDCCM&H/U connector and chassis ground. Connector & terminal (B310) No. 14 (+) - Chassis ground (-):	Is the voltage 10 - 15 V?	Go to step 2.	Repair the power supply circuit.
2 CHECK THE VDCCM&H/U GROUND CIRCUIT. Turn the ignition switch to OFF. Measure the resistance between VDCCM&H/U connector and chassis ground. Connector & terminal (B310) No. 6 - Chassis ground:	Is the resistance less than 0.5 Ω?	Go to step 3.	Repair the VDCCM&H/U ground harness.
3 CHECK POOR CONTACT OF CONNECTORS.	Is there poor contact in connector between generator, battery and VDCCM&H/U?	Repair the connector.	Go to step 4.
4 CHECK THE VDCCM&H/U. Connect all the connectors. Erase the memory. Perform the Inspection Mode. Read the DTC.	Is the same DTC displayed?	Replace the VDCCM&H/U. < Ref. to VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM&H/U) . >	Go to step 5.
5 CHECK OTHER DTC DETECTION.	Is any other DTC displayed?	Perform the diagnosis according to DTC.	Temporary poor contact occurs.